Rotary engine.



No. 7l3,649. Patented Nov. l8, I902.

T. M. KENNEY.

ROTARY ENGINE.

(Application filed Oct. 81, 1901.) (No Model.) 2 Sheetv-Sheat .I.

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d 20 9 di f I/Z'ZEGSJGS; 4L Jia'vanfo'r v iw No. 78,649. Patented Nov. 18, I902.

T. M. KENNEY.

ROTARY ENGINE.

Applicafion flied Oct. 31, 1901,) (No Model.) 2.8heets-Shaet 2.

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Darren STATES area THOMAS M. KENNEY, OF CAMBRIDGE, MASSACHUSETTS, ASSIGNOR OF ONE- HALF TO DAVID FARQUI-IAR, OF CAMBRIDGE, MASSACHUSETTS.

ROTARY ENGINE.

SPECIFICATION formingpart of Letters Patent N 0. 713,649, dated November 18, 1902.

Application filed October 31, 1901. Serial Nil-80,63 1. (Ne model.)

To n/ZZ II/7001111 it may concern: ery of the former, as by a bracket or arm f. Be it known that I, THOMAS M. KENNEY, a The piston a is disposed substantially at right citizen of the United States, residing in Camangles to the disk or carrier 7) and is adapted bridge, in the county of Middlesex and State to be moved in a circular path formed by 5 of Massachusetts, have invented an Improvesemicircularly annular grooves g h on the inment in Rotary Engines or Motors, of which terior walls of the parts of the casing. The the following description, in connection with disk or carrier 1) is fast on the shaft 0, and the accompanying drawings, is a speciiicathe said disk and its piston a cooperate with tion, like characters on the drawings reprea revoluble cylinder j, forming an abutment 1o senting like parts. for the steam to act against, said cylinder be- This invention relates to a rotary engine or ing supported in cylindrical sockets in the motor which may be actuated by steam, hot two halves of the casing and being made of air, gas, water, or other suitable medium or suflicient diameter to extend across the ciragent and which to facilitate description will cular path traveled by the piston a and en- 15 behereinafterreferred toasasteam'engine. gaging the periphery of the circular carrier The engine or motor may be single or comor disk I). The cylindrical abutment is propound, and in the presentinstance itis illusvided with a recess or opening 7c for the entrated as a single engine or motor. trance of the piston a in its travel and with The invention has for its object to provide a further opening l, communicating with the 20 a simple, efficient, noiseless, and economical opening 76, for the reception of the bracket or engine, and for this purpose I employ a pisarm f. The abutment] is mounted on ashaft ton mounted on an axis to move in a path 12, provided With a gear 0, which meshes with concentric with the said axis within an ina gear 13 on the shaft 0, and by means of said closing casing, and the said piston is arranged gears the abutment and the piston are re- 25 to fill said path, so that it can be provided with volved in unison.

steel or other packing which will make a The abutmentj may be provided,as shown, steam-tight fit with the walls of the said path with packing strips or bars .9, located in axiand separate the latter into steam-tight comally-extended slots in the periphery of said partments. The engine or motor is provided abutment and forced outward into close con- 30 with an abutment which rotates in unison tact with the walls of the sockets containing with the piston and is recessed to receive the the cylinder by springs tor in any other suitsame, as will be described. These and other able manner. features of this invention will be pointed out The engine is provided with a steam-inlet in the claim at the end of the specification. pipe 10, which in the revolution of the piston 35 Figure 1 is a side elevation of a rotary enis adapted to communicate with a pocket,

gine or motorembodying this invention; Fig. channel, or groove 12 in one face of the car- 2, an end elevation of the engine shown in rier or disk I), (see dotted lines, Fig. 3,) and Fig. 1 looking toward the right; Fig. 3, an the said pocket communicates with a port or elevation with one-half of the casing repassage 13, extended from the periphery of 4o moved; Fig. 4,21 section on the line a 4, Fig. the disk or carrier 1) to said pocket. The

3; Fig. 5, a detail of the abutment on an enport or passage 13 is located in close proxlarged scale; Figs. 6 and 7, details of the pisimity to the piston 0; and admits steam into ton and its carrier shown in Fig. the live-steam chamber 15, formed on one side Referring to the drawings, (t represents a of the piston a by the latter and the abut- 45 cylindrical disk constituting the piston of my mentj, the exhaust-steam chamber 16 being improved engine, which is attached to a secformed on the opposite side of said piston and 0nd disk Z), mounted on a shaft 0, supported communicating with the exhaust port or pasin bearings in the two parts or halves (Z c of sage 17 in the casing and with the exhaustan inclosing casing. pipe 18. too 50 The disk I) constitutes a carrier for the pis- The cylindrical piston a may and preferton a, and the latter is aflixed to the periphably will be provided with a steel or other minimum consumption of the same.

packing-ring 19, and, if desired, the circular carrier or disk I) may also be provided with a similar packing-ring 20.

The operation of the engine may be briefly described as follows: Assuming the parts in the position shown in Fig. 3, steam passes through the inlet-pipe 10 into the pocket 12, thence through the port or passage 13 into the chamber 15, wherein it acts against the piston and the abutmentj and moves the piston in its annular path in the direction indicated by the arrow 25. Steam at boiler-pressure thus acts on the piston until in the revolution of the piston and its carrier the latter is moved a sufiicient distance to remove the pocket 12 from in line with the steam-inlet 10 and to close the latter, whereupon the steam in the chamber 15 acts expansively and continues to move the piston until the latter passes by or uncovers the exhaust-port 17, at which time the piston will have acquired sufficient momentum to complete its movement and again uncover the steam-inlet port or passage 10.

I have herein shown and described my invention as embodied in a single-acting engine; but I do not desire to limit myself in this respect, as it is evident the invention may be embodied in a compound engine, and, further, by duplication of the piston and steamports in a manner well understood the engine may be made reversible.

By means of the steel packing-rings on the piston steam-tight chambers or compartments on opposite sides of the said piston are insured, consequently enabling the engine to WOIk without leakage of steam and with a Furthermore, the recessed cylindrical abutment revolving in unison with the piston permits the engine to be operated at a substantially high speed with a minimum noise, thus removing this objection to engines of this class. Furthermore, a small compact engine of substantially great capacity can be made at a minimum cost, owing to the simplicity of its parts.

I claim In an engine of the class described, the combination with a casing having an annular path and a cylinder extended transversely of said annular path, a shaft 0 extended through said casing concentric with said annular path, a disk fast on said shaft, a piston attached to the periphery of said disk substantially at right angles thereto and movable in said annular path, a second shaft 1?, extended through said casing concentric with the cylinder in said casing, a cylindrical abutment fast on the shaft '11 and provided with a recess for the reception of the said piston, packing strips or bars located in axially-extended slots in said cylindrical abutment, means to force said strips or bars into contact with the inner wall of said'cylinder, a steam-inlet port in the side of said casing adapted to commu nicate with the annular path between the said piston and cylindrical abutment, an exhaustport in said casing communicating with said annular path, and gears on said shafts to effect continuous rotation of the said disk and cylindrical abutment in unison with each other, substantially as described.

In testimony whereof I have signed my name to this specification in the presence of two subscribing Witnesses.

THOMAS M. KENNEY.

VVitne'sses:

J AS. H. CHURCHILL, J. MURPHY. 

